28144607800 has 96 divisors (see below), whose sum is σ = 68448163680. Its totient is φ = 10742054400.

The previous prime is 28144607797. The next prime is 28144607819. The reversal of 28144607800 is 870644182.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1929334 + ... + 1943866.

It is an arithmetic number, because the mean of its divisors is an integer number (713001705).

Almost surely, 2^28144607800 is an apocalyptic number.

28144607800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28144607800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34224081840).

28144607800 is an abundant number, since it is smaller than the sum of its proper divisors (40303555880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28144607800 is a wasteful number, since it uses less digits than its factorization.

28144607800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14993 (or 14984 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The spelling of 28144607800 in words is "twenty-eight billion, one hundred forty-four million, six hundred seven thousand, eight hundred".